Help with How to Find Owners?

[Collectblu69]

Hello I'm trying to create a blu-ray company specializing in exploitation movies like Blue Underground, Vinegar Syndrome, etc, and I need help in trying to figure out my first step. What is my first step in locating the rights holders of old spaghetti westerns or grind house movies? Do I need to attend a film distribution conference and meet with sales agents? I've looked into the cost of 4k scans of 35mm negatives and it's affordable. I also know labs that do this but for the life of me I can't figure out what the first step as far as rights and setting up a deal. Thanks!